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Finding the Fourth Proportional to 18,987.89, 28,483.22 and 7,301.12

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Solution

The fourth proportional to 18,987.89, 28,483.22 and 7,301.12 is: 10,952.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.89 : 28,483.22 = 7,301.12 : x
  2. Step 2: Convert to fraction form
    18,987.89/28,483.22 = 7,301.12/x
  3. Step 3: Cross multiply
    18,987.89x = 28,483.22 × 7,301.12
  4. Step 4: Simplify right side
    18,987.89x = 207,959,283.04
  5. Step 5: Solve for x
    x = 207,959,283.04/18,987.89
  6. Step 6: Final answer
    x = 10,952.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.